Any grey or soft brown

Hard to say without seeing color chips, but some tones of blue read as a neutral with bright purple and green.

Check out https://www.facebook.com/designseeds for stunning color combinations or their web page at http://www.design-seeds.com/.

http://www.benjaminmoore.com/en-us/paint-color/snowconegreen
http://www.benjaminmoore.com/en-us/paint-color/hydrangea
http://www.benjaminmoore.com/en-us/paint-color/fireandice
these are the colors in her room mostly on the linen

chris warren could you give some examples

Orange would complete the triad but a neutral also makes sense. With that said, it sounds more like an art project than a decorative scheme. Go with whatever feels good to you.

Your are right wanting a neutral color. Soft khakis, yellows or even oranges will complement purple and green. However, it all depends on what exact shades you currently have. Pictures of existing space always help. See attached color combinations for inspiration.

I think the rooms too small for another color like orange

my purple and green are exactly the colors of the first picture

Years ago when my daughter was a tween she begged for a midnight or navy blue bedroom. I finally relented if she promised to paint over it when she no longer wanted it, to which she agreed. The room is ten foot ish by ten foot ish and I was surprised that it did't feel claustrophobic after painting it the dark color, including the ceiling. We bought a shiny jewel tone purple bedspread and after digging through my things, she found an old saree with large purple and green paisley pattern on a medium blue background which we hung as a canopy over her daybed. It sounds like a hot mess, but in person it really was gorgeous. BM makes two colors called Hale blue and Stunning that might work. I don't know how to link directly to pictures on Houzz so here are a few screen shots of things I found on Houzz and you can find lots of examples of navy walls paired with something different than the expected crisp white. Oh, I ended up repainting the room...

How about a stark white?

what color gray?

this bed is in the room with deep purple with small lavender hearts on one side and the other has lavender and bright green plaid comforter and btight green sheets

Teal ,think peacock

could you give me a shade that'll go with it? I can't figure out how it'll go

would it look too bare with stark white?

Stark white would let the purple and green be the stars. Adding a color like gray could be tricky. All colors can have warm or cool undertones. With a stark white you would have a cool undertone. I think a warm undertone would look "muddy", even though we are talking about white. Any art you choose to use would work. Any curtain would work. The colors you add in accessories would only have to work with the right undertones of the purple and green. :)

all the accessory's are either lavender or darker shaedes of warm purple. I don't really want a cool room want it to be warm and relaxing

I think you should take the accessories that you want to set the tone for the feel of the room with you when you are looking for paint. I prefer the system Sherwin Williams uses to describe the light reflective value and tonal qualities of their paints. If you live in an area with more than one Sherwin Williams store, call around to find out if one of them has a color consultant. When you find several colors that you like - of any brand - buy sample cans and either paint large swatches on the walls or paint large swatches on poster board and move them around the room during different times of the day to get a feel for how the paint will look in different light. I prefer to paint the wall. I'm going to paint it anyway, lol. Benjamin Moore sells sample sizes of their paints too.

How about trying to see what color would look good as an accent wall on the bed wall (to help hide grubbies that collect on a wall right next to a bed and painting the other walls a white with matching undertones. I, like happyasaclam, prefer SW. It doesn't fade with the notorious Co. sun, goes on like a dream, and because I signed up on their website, I often receive forty percent off coupons in the mail. They have quart samples, and although they said it's not the same quality as their other paints, at six something regular price, it's a good deal and at forty percent off, it's a steal.

These are the colors that I use in my daughters room. Let me know if you need paint colors.

It's really nice! is the curtained off part a closet? cuz mine has a big wall open closet and I'll love something like that

Yes, took two of the same curtain then mounted it on a shower curtain rod inside the closet. So much easier than putting on a closet door.

here's the room but replaced the sheets with bright green
what color fabric should I make a closet curtain? preferably a pattern

would gray go? or is it too many colors already?

A great gray that works with greens and purples is Benjamin Moore Revere Pewter and the one that is a shade lighter, Edgecomb. I used Revere Pewter in my kitchen and Edgecomb in my den and dining room. Revere Pewter is my favorite of the two. I can see hints of green in Edgecomb. I would suggest that whatever color you choose, get the sample size to try it out. :)

Decorgirly, is that a playpen I see in your room?

I think that gray can work but you have to be willing to try out some colors to see which one will work best. Take the suggestions from here then go to the paint shop, look around and see what you can come up with. Take them home and try them that is the best way to go with colors.

the playpen was temporary it's not there anymore
would it work having gray in just the curtains for the closet? I don't want to much. I'm afraid it'll get to depressing

I'd go with a pumpkin orange.

hayley, would it be too busy? it's a pretty small room

What about the nursery border wall paper at the top of the room?

Do you have more pictures of room decorgirly.

Decorgirly, Are you sure your teen can still fit into that bed?

Yellow

You said you have dark purple accent pieces. I would probably go with a light green and add a few splashes of either hot pink or orange

my daughter is only 4'10 and as soon as the 4 year old is old enough they'll switch beds so the bed is no problem. the reason were painting the room is to get rid of the border. Should I do yellow draperies for closet? where else can I add yellow?

Check out this site to see if you see anything that you like. You have been given some great colors and I think that it is ultimately up to you. Still need to see more of the room to make better suggestions.
http://design-seeds.com/index.php/home/entry/spring-light1
http://design-seeds.com/index.php/search?hex=d1abd9
http://www.pinterest.com/pin/514677063635349842/